Lock-nut.



C. N. PARKER.

LOCK NUT.

APPHCMION mu) MAR 22.. 19m.

1 1 97 ,7 5 9 I Patented Sept. 12, 1916.

1 m) u n b e CHARLES n. PARK R, or PALATKA, rnomne,

Specification of Letters Patent.

Ifatentod Sept. 12, 1916.

Application filed March 22, 1915. Serial No. 16,201.

To all from it may concern:

Be it known that 1, CHARLES N. PARKER, a citizen of the United States, residing at .Paii-itka, in the county of Putnam and State of lfiloi'ida, have invented certain nelv and useful Improvemen'tsin Lock-Nuts; and I do hereby declare theiollowing to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the sainc.

This invention has for its object to providesimple and eflicient lock nut embodyirig essentially a; locking key slidably engugeilwiiahin a. recess formed radially in the outer face of the nut and having-1i reduce-d bolt thread-engaging and adapted to bite into the thrends of the bolt to lock the nutagziinst rotational movement in one direction thereon.

With this and other objects in view, the invention consists in the novel construction,

, arrangement and fiinrmation parts as will and; fig. 4 represents an enlarged move-u.

' 7 ring to tho dl'ziwingin detail, where reteremze muncrnlsdcsignnte coi din; {nil-ts tin-oughout theseveml \irws. lino nun: 5 indicates tho shank of a be of. any preferred con and includes at head 3 and screw- Six fh 7 extending inwardly from the op- ;m eend thereof. A nut 8 1sv threaded nyon the shank 5 of the bolt and is formed outer face with a recess or sent 9 extei'i-ling' radially from the internally screw tilt-curled bore'and terminating in spaced relatiun to the sidefaccs thereof. The longitudinal side walls of the recess or; sent 9 are uliwardly converging and slidiibly resolve the cornspondingly shaped body poi represents an end elevation spcctivc view of the locking key tion 10 of the locking key, designated generally by the numeral 11 and' including a reduced extension 12 having a beveled end" 13 designed to snugly fit the threads 7 of the bolt. The locking key 11 is preferably constructed of spring metal and is of'slightly greater length than the distance between the Screwthreads 7 of the bolt and the outer end wall .of the recess 9 so as to cause the re' ducod extension 12 to. curve or bend slightly, as illustrated in F 2, when the nut 8 is advanced upon the bolt.

In use, the key 11 is inserted in the seat or recess 9, prior to theapplication of the nut on the bolt and the nut 8isfthen posi-' tioned upon the screvvthreaded end of the bolt 5 and advanced to the desiredposition thereon, the tapered extremity of the extension .2 engaging the groove offthe thread 7. The key is prevented from lateral re mova-l from the groove 9 by the'op'positely inclined side wallsthereof engaging the correspondingly shaped"walls of the groove. Rotational movementof the nut 8 upon the bolt in a direction to remove the nut therefrom, tends to straighten thespring exten-. sion 12 of the key and thus the beveled end 125 bites into the thread of the bolt and reliubly locks the nnteigitinst removal,

\Vhzit- I claim is:

A look nnt comprising a nut l'mvinf, an internally scrcwt-hrcaded bore and 2t radial groove in one face communicating with the bore-and having outwardly converging side \Vlll s, a locking key including'n body having the side facesinclined correspondingly to the converging side wnllsof snid recess and beingslidnblc longitudinally in said groove and secured against lateral removal from the latter, and a reduced resilient extension on said key having 2i bev-' eled end adapted to engage the sc'rewthread of n bolt fitted in the nut.

In testimony whereof I affix" my signature in prcsenceof two witnesses.

QCHARLE SN. PARKER.-

\Vitnesses:

VVAL'IER H. CnowELL, RANUALL WELLS. 

